Improved automatic fan



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CHARLES E. BURLEIGH, 0E TUETONBOROUGI-I, NEW HAMPSHIRE.

Letters Patent N 98,347

, dated December 28, 1869.

IMPROVED .A'U'TOMATIL FAN'.

The Schedulexeferred to in these Letters Patent and making part of the same.

To all whom it may concern:

part of this specification, in whith-V Figures 1 and 2 represent opposite'sectional elevations, the` former with the adjustable connecting-device or apparatus by which it is applied to a support, and held in the operating position.

Figure 3 represents an end elevation of the clock and the operating-mechanisms, detached from the spherical case.

Figure 4 represents a plan or top view of iig. 1, after the hinged cover F has been removed.

Figure 5 represents the spring-pendulum and fanblade detached.

Figures 6 and 7 represent an edge and front orside view of the pendulum-head, the latter with one ofthe Vsupporting-bars c c removed, to show the position of the coiled spring D.

Figure 8 represents a side view of the fan-blade iu three different forms, with the lower end of the peudulum-rod with which such blades are connected.

This invention relates to that class of automatic fans which is designed for agitating the air about the head and face of a person in a recumbent or reclining, or other 'posture or attitude, and in hospitals, sick rooms, or other places where it may be necessary, important, or agreeable to disturb and change the air about the head and face. f

In .constructingand operating my improved automatic fan, I employ a common flat coiled clock-spring, arranged within `a drum, A, and geared in any snitable manner.

In the present instance, the first gear a., or first driver, is formed on the projecting flanged head'ot` the drum, and this iirst driver gears into a-small pinion, b, arranged on a cross-shaft, ll, which, like all the other shafts, are hung or pivoted in the two end frames B.

On the shaft d, and outside of the pinionb, I apply. a'larger gear, c, which gears into a second pinion, e, on av lower shaft, f.

On the opposite end of the shaft f, I arrange an eccentric, g, and on this a strap having an arm, h, extending'beyond the centre, as shown.

Supporting-guts C are arranged between the lower portion of each frame end B, and, between these girts, I hang thexshaft t' and the pendulum.

A lever, m, secured to the shaft 'i and rising above it, connects with the arm lt by a pivot, 4.

The pendulum is connected with' its shaft t' by a coiled spring, D, arranged Within a ring or hoop, E. One end of the spring is secured to the hoop, and the other end to the shaft Supporting-bars c c extend' across the hoop E, and the shaft t' passes through these bars, and these sup- .port the pendulum and the fan-blade Gr.

- To the winding-stem H, I apply'the key, and wind the spring iu the drum A, in the usual way. This sets the train of gearsin motion, causing the shaft f and the eccentric to rotate, and, by means of the arm l1, and the lever yn, impart an oscillating motion to the pendulum and the fan-blade, to disturb or agl -ate the air.

The fan-blade should be adjusted to a position over and near the head or face of the patient, or the person to be fanned, and this adjustment may be provided for in various ways.

' In the present instance, the spherical case is hung in a ring, J, and on two trunuionsor swinging pivots, It, passing through .the ring and shouldered within it. The trunnions admit of one adjustment of Athe vcase and the fan, by swinging the latter on theformer.

Toon'e side of the ring J, I connect a tubular arm, K, and this slides on a smaller arm or bar, L, and is adjustable thereon by a set-screw, m, clearly showniu figs. 41 and 4.

One end of the bar L is connected with the outer jaw M, of a clamp, and the inner jaw N slides freely on this bar.l

it clamping-screw, S, passes loosely through the outer-v jaw, and is screwed through the lnner one. The clamp is intended for applying the apparatus to thehead-board of a bedstead, the back of an easychair, or to any other suitable support, T, near the head of the patient.

' It is evident that a wider scope of adjustment may be given to the spherical case and the fan, by employing swing-joints, like or similar to the swing-brackets *used in gas-fittings, and still retain the other adjustment of the sleeved arms K and L, and set-screws m, to hold them in position.

Through one side of the case,I apply a regulatings crew,'] with its inner end capable of being pressed against the periphery of the drum A. This screw is intended as a friction device, to hold the drum while winding,and to prevent the too sudden and rapid motion thereof when the spring is fully wound.

The principal novelty of this invention is the spring- A head, pendnlum, and the operating-connections. The motion imparted to the former and to the fan, by the operating-mechanisms, is not only accelerated, but

considerably extended or increased by the active force.

of the coiled spring D, which exerts `a resistance to the action of the eccentric, twice at each revolution of the latter, and ateach throw or oscillation of the pendulum and the lfan-blade; and this resistance or' resisting action of the spring increases, extends, and

l accelerates the motion of the fan-blade, and renders it more potent for agitnting the surrounding air.

The motion given to the lower extremity of the fitnblade, in an apparatus of the size shown, and by the eccentric alone, is less than two inches, and this moe tion is increased or extended, by the action of the auxiliary spring, to nearly four inches, or -nezn'ly or quite twice the extent of motion given by the eccentric,

I believe I have 4described and represented the iinprovernent-s which I have invented, so as to enabe any person skilled in the art t-o make and use them,

without further invention or experiment. I will now state what I desire t-o secure by Letters Patent, viz:

1., The spring-head pendulum, as described, the same consisting of the ring E, ba-rs c c, spring D, shaft i, pendnluimrod and fan-blade G, all combined, arranged, and operating as and for the purpose specified. 2. The combination, as described, of the eccentric g with the springqhend pendulum and fen-blade G, by

means of the {t1-u1 h and lever n, in the manner and for the purpose specified. Witnesses: n CHARLES F. BURLEIGH.

JOHN E. CRANE, J. S. WHITNEY. 

